[Galleriffic] Open image in bigger size when clicking on it

[Galleriffic] Open image in bigger size when clicking on it

I'm trying to customize my gallery with Galleriffic

http://www.twospy.com/galleriffic/example-2.html

But something important for me, is that when you click on the picture, a bigger version of itself appears (as a lightbox pop-up), instead of just switching to the next one.

Anybody could help me with that ?